Monitor stand



FIG. 1 is a front, top, left perspective view of a monitor stand;

FIG. 2 is a front, bottom, left perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a rear side view thereof;

FIG. 7 is a left side view thereof; and,

FIG. 8 is a right side view thereof.

The broken lines in FIGS. 1, 2, 4 and 5 illustrate portions of the monitor stand that form no part of the claimed design. 

CLAIM The ornamental design for a monitor stand, as shown and described. 